Full Triangle shaped with white light on each corner, silent, moving faster than most airplanes or jets I have seen.

I have been wanting to report this for years. I was 11 my brother was 6. We were playing in our front yard. It was almost completely dark. I saw something fly over. I looked up and saw it. I yelled at my brother to look. It was huge, black triangle with a white/ yellowish light on each corner. Flying very low. Completely silent. It was flying from SW to NE. We ran inside and told my dad we saw a flying saucer. He didn’t believe us and dismissed. I went back out to see it but it was gone. My dad took us to every air show in our area. He also flew a small plane. So I was familiar with planes and jets. This was nothing like I have seen before. I actually forgot about until I saw it on the show “Ancient Aliens “4 years ago. I saw it and I told my boyfriend …that’s it. That’s the UFO I saw with my own eyes when I was 11. At the time I didn’t realize it, but it was probably heading to the air force bas in Columbia MO.
I know it’s an old report. 50 yrs ago. But I wanted to tell people what I saw.